CPC H02J 9/061 (2013.01) [F03D 7/0264 (2013.01); F03D 9/11 (2016.05); H02J 1/106 (2020.01); F05B 2270/1071 (2013.01); F05B 2270/337 (2013.01)] | 15 Claims |
1. A wind turbine comprising:
an internal power supply grid for distributing power to a number of power consuming units of the wind turbine; and
a power backup system connected to the internal power supply grid for supplying power to said internal power supply grid during a grid fault, wherein the power backup system comprises a plurality of series connected power storage units that provide a total backup voltage that falls within a nominal voltage range of the internal power supply grid such that a voltage level of the total backup voltage from the plurality of series connected power storage units is unmodified when provided by the power backup system to the internal power supply grid.
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